Galvanized steel pipe Outer ID: 20mm-219mm Wall thickness: 0.8mm-8mm high ... includes two subsidiaries: Shandong Zhongguan Traffic facility Co.,Ltd and Shandong Zhongguan Import and Export Co.,Ltd. Total area of group is approximately 320 ... the quantityStock Yes StandardASTM-A53A, BS1387-1985, GB/T3091-2001Applicationoil pipe, gas pipe, fluid pipe, hydraulic pipe etc.Factory Galvanized steel pipe